George m



.G. M. CONWAY.'

(No Model.)

` PUMP.

Patented Mar'. 13.1883.`

...mrnnnuubwf M Ma/Lofi,

4UNITED "STATES PATENT OFFICE.

GEORGE M. CONWAY, OF MILWAUKEE, WISCONSIN.

PUMPr SPECIFICATION forming part of Letters Patent No. 273,962, dated March 13, 1883.

` Application led April 21, 1882.` (No model.)

To all whom it may concern:

Be it known that I, GEORGE M. CONWAY,

of Milwaukee, in the countyof Milwaukee,`

and in the State of Wisconsin, have invented certain new and useful Improvements iu Pumps; and I do hereby declare that the following is a full, clear', and exact description thereof.

Myinvention relates to steam-pumps; and it consists mainly in providing` the water-chamberwith a suction-valve plate -that is made.

chamber.

C is the cylinder, with which is cast the bedpiece D. In its longitudinal center I provide the cylinder C with a bridge, c, that extends up and ontV to each side" of the pump, and is reduced in depth from its center to its ends to allow full communication of the Water from one" end to the other of the pump. This space around the cyliuderC constitutes the suctionchamber. I also extend partitions o' o' up from the cylinder-one at each en d-to a level with bridge o. These latter serve to separate the suction from the cylinder-port d, and a bridge, d', serves as a brace at each end between the shell of the pump and partitions c'. a a are llanges on the cylinder part of the pump, which, with the bridges cand d yand partitions c', support the suction-valve plate A'. The shell ot' the middle chamber has flanges a', that correspond to those on the cylinder portion, and these rest upon the plate A' after it has been placed upon the flanges a, andthen bolts b b serve to clamp the plate A' between the suction and middle chambers.

` through 11e-enforces in the partition F and down I further secure the middle chamber to the cylinder portion by screw-bolts ff, that` pass into the bridge c, which `is screw-threaded to receive them. Now, while the suction and middle chambers clamp the suction-valve plate securely-between them, and the structure is.

as strong and tight as if cast all in one piece, if any of the suction-valves should get out of order `or thae cylindershould become porous or spring a leak, the suction-valve plate may :interior accessible.

The middle chamber, B', of my pump is divided by a partition, F, into two compartments, each compartment connecting with one endet' the cylinder C through a port,d, while Y the inlet-port B connects with the middle 1 chamber through ,valves that open np into it from plate A'. Now, when the piston makes a stroke to the right it leaves a vacuum in the `front end ofthe cylinder, which is filled from the front compartment of the middle chamber by the water from the port B, and at the same time the Water in front of the piston-head is forced up into the rear compartment of the middle chamber and ont through the valves `in its top plate to the discharge-chamber, and `then the return-stroke of the piston expels .the Water from the frontend of the cylinder into theifrontcompartment of the middle cham ber, and also out through the valves in the top plate, and thus each stroke of the piston expels the water from one compartment ofthe middle chamber while it creates aA vacuum in the other that is filled by the water l'rom the inlet-ports.

What I claim as my invention, and desire to secure by Letters Patentfis- 1. In a pump, the suction and middle chambers, in combination with a removable horif zontal suction-valve plate that separates them, as set forth.

A2. The cylinder C, partitions c', and bridges c and d', in combination with suction-valve plate A' and chamber B', as set forth.

3. In a pump, the combination of the suction-chamber, having suction-port B, cylinder C, and cylinder-port d, and above the same removable horizontal suction-valve plate A', above this double middle chamber, B', provided with top valve-plate, and above this the discharge-chamber, all substan tially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand on this 11th day of April, 1882,in the presence of two witnesses.

Witnesses: GEO. M. CONWAY.

STANLEY S. SrroU'r, HAROLD G. UNDERWOOD.

IOC. 

